﻿<blockquote class="extDef">NOTE&nbsp; Definition according to ISO/CD 10303-42:1992<br>
This function returns the vector (or cross) product of two input directions.
The input directions must be three-dimensional. The result is
always a vector which is unitless. If the input directions are
either parallel or anti-parallel a vector of zero magnitude is
returned.</blockquote>

<blockquote class="note">NOTE&nbsp; Function adapted from <strong>cross_product</strong> defined in ISO 10303-42.</blockquote>

<blockquote class="history">HISTORY&nbsp; New function in IFC1.5</blockquote>